P1260

a. Rerun Self-Test, refer to Symptom Quick Test

d. Refer to Battery and Charging System Starting and Charging

e. Refer to Automatic Transmission Transmission and Drivetrain

f. Refer to Lighting Lighting and Horns

g. Carry out the KOEO self-test. Key On Engine Off (KOEO) On-Demand Self Test Diagnose all other DTCs first. Clear the DTCs. Repeat the KOER self test. If DTC P1284 is retrieved again, refer to the Performance Diagnostic Procedures to diagnose the high pressure oil system. Performance Diagnostic Procedures

h. If the Glow Plug Monitor Self-Test aborts and this DTC is present, repeat the Glow Plug Monitor Self-Test.